violence in 20 years. abc's tahman bradley is joining us from washington, where there's already reaction. good morning, tahman. >> reporter: good morning, sunny and john. get ready for a big fight. president obama's proposals to curb gun violence are already being met with enormous opposition from the nra. the nra did not wait for president obama's announcement. overnight, the powerful gun lobby launched a preemptive strike, releasing a provocative video attacking the president's character. >> he's just another elitist hypocrite. >> reporter: the video points out that mr. obama's children have armed protection in school. and asks -- >> why is he skeptical about putting armed security in our schools? >> reporter: president obama will have to overcome nra opposition and convince congress to pass his measures to curb gun violence. when mr. obama unveils his proposals today, he'll do so flanked by children who wrote letters expressing concern about gun violence. the president will call on congress to ban milit